Globo Product Options, Variant

Tried my fair share of product options apps and this one is a clear winner. In my opinion, it wins on 3 fronts:

1) Usability - most other product options apps are a pain to use. Globo's user experience is about as hassle free as it gets.
2) Price - it beats out its competitors.
3) Customer Service - the customer service turnaround time was phenomenal. They were able to tailor their solution to my theme and everything turned out great.